TL;DR:
Machine ready/waiting/busy status at a glance.

The mod displays a machine status summary in a chosen part of the screen. This will list ALL machines in ALL locations.
The mod can be configured to display "ready" machines (with items waiting to be picked up), "waiting" machines (awaiting new input), and/or "busy" machines (currently processing).
The machines can be grouped by type, and also by the item they're holding.
The machines can also be sorted by machine name, item name, by whether they're ready/waiting/busy and by distance from the player (only applicable if the player is in the same location).
The mod has a built-in list of machines it supports, but custom ones can also be added to the config.

The default settings are to display ALL "ready" machines, plus "waiting" Casks, Kegs, Preserve Jars and Crab Pots.

Multiplayer compatibility
The mod has been tested both in normal co-op, and also in split screen. Actually, it even has a dedicated option for split screen to only show the display on either the first or last screen (or all of them).

Mod compatibility
The mod should be compatible with all Json Assets machines and items. It should also be compatible with most (all?) Dynamic Game Assets machines.
The mod was also tested with Custom Object Production and Producer Framework Mod mods.

Configuration
The mod has Generic Mod Config Menu support. You can also edit the config.json file manually, but there are SOOOOOOOOO many options, that it's even hard to list them, so using GMCM is VERY recommended.

Other info
You can find the source code here.